CN115047686A - Electronic ink screen and display device - Google Patents

Abstract

The embodiment of the application provides an electronic ink screen and display device, and this electronic ink screen is at least including range upon range of setting: the ink display device comprises a first conductive substrate, an ink display layer and a second conductive substrate; the ink display layer is positioned between the first conductive substrate and the second conductive substrate, and the second conductive substrate is positioned above the first conductive substrate; the ink display layer is provided with a plurality of mutually independent ink accommodating cavities, a plurality of ink particles of the same color are arranged in the ink accommodating cavities, and the ink particles are used for displaying a first color; further comprising: a functional layer; the functional layer is used for displaying a second color; and the functional layer is positioned on one side of the ink display layer, which is far away from the second conductive substrate. The electronic ink screen refreshing method and device can improve the refreshing speed of the electronic ink screen, and therefore the response time of the electronic ink screen can be shortened.

Description

E-ink screen and display device

technical field

The embodiments of the present application relate to the technical field of electronic paper display, and in particular, to an electronic ink screen and a display device.

Background technique

At present, the common electronic ink screen is composed of two substrates, and an electronic ink layer composed of numerous microcapsule structures is arranged between the two substrates. The electronic ink layer is composed of many black ink particles that are positively charged and negatively charged. Many of the white ink particles are sealed in a microcapsule structure that is liquid inside. Because the ink particles of different colors will move in different directions due to the difference of the applied electric field, the ink particles of different colors are arranged in an orderly manner, so that the electronic ink screen presents a black and white visualization effect.

However, in the above solution, the black ink particles and the white ink particles have different charges, and they will interfere with each other when they move, resulting in a slower refresh rate of the e-ink screen and a longer response time of the e-ink screen.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an electronic ink screen and a display device, which can improve the refresh speed of the electronic ink screen, thereby shortening the response time of the electronic ink screen.

In a first aspect, an embodiment of the present application provides an electronic ink screen, the electronic ink screen at least includes a first conductive substrate, an ink display layer and a second conductive substrate arranged in layers; the ink display layer is located on the first conductive substrate. between the substrate and the second conductive substrate, and the second conductive substrate is located above the first conductive substrate; the ink display layer has a plurality of mutually independent ink accommodating cavities, the ink accommodating cavities A plurality of ink particles of the same color are arranged inside, and the ink particles are used to display the first color; it also includes: a functional layer; the functional layer is used to display the second color; and the functional layer is located in the ink display layer the side facing away from the second conductive substrate.

In the electronic ink screen provided by the embodiments of the present application, by arranging a functional layer on the side of the ink display layer away from the second conductive substrate, when a vertical electric field is applied, a plurality of ink particles in each ink accommodating cavity move to the Close to the inner top wall or inner bottom wall of the ink containing chamber, the color displayed by the electronic ink screen is the color (ie the first color) displayed by the ink particles in the ink containing chamber; when an electric field in a parallel direction is applied , a plurality of ink particles in each ink accommodating cavity move to the inner side wall of the ink accommodating cavity, and the color displayed by the electronic ink screen at this time is the color produced by the functional layer (ie the second color); When there is an electric field in the parallel direction and the electric field in the vertical direction, a plurality of ink particles in each ink accommodating cavity are dispersed and arranged in the ink accommodating cavity, and the color displayed by the electronic ink screen is between the first color and the second color. Between colors, the e-ink screen displays a gray state. Therefore, in the embodiment of the present application, it is only necessary to arrange a plurality of ink particles of the same color in each ink accommodating cavity, and by applying electric fields in different directions, the electronic ink screen can be rendered in different colors, avoiding the need for the prior art. The problem of movement interference caused by the mutual switching of ink particles of two different colors can improve the refresh speed of the e-ink screen, thereby shortening the response time of the e-ink screen.

In a possible implementation manner, the first conductive substrate includes: a driving layer and an electrode layer; the driving layer provides a voltage for the electrode layer, so as to form an electric field in a vertical direction and an electric field in a horizontal direction.

In a possible implementation manner, the electrode layer includes: at least one electrode group; each of the ink accommodating chambers corresponds to one of the electrode groups; the electrode group includes: a first electrode and a second electrode; The first electrode and the second electrode are oppositely arranged along a thickness direction perpendicular to the electronic ink screen; the driving layer provides a voltage for the electrode layer, so that the electrode layer and the second electrode are connected with each other. An electric field in a vertical direction is formed between the conductive substrates, and an electric field in a horizontal direction is formed between the first electrode and the second electrode; the electric field in the vertical direction is used to control the ink particles to be contained in the ink The vertical movement is performed in the cavity, and the electric field in the horizontal direction is used to control the horizontal movement of the ink particles in the ink accommodating cavity.

The driving layer provides a voltage for the electrode layer, so that a potential difference is formed between the electrode layer and the second conductive substrate, so as to form a vertical electric field between the electrode layer and the second conductive substrate. For example, the driving layer alone provides a voltage for the first electrode, so that a potential difference is formed between the first electrode and the second conductive substrate, so as to form a vertical electric field between the electrode layer and the second conductive substrate. Alternatively, the driving layer alone provides a voltage for the second electrode, so that a potential difference can be formed between the second electrode and the second conductive substrate, so as to form a vertical electric field between the electrode layer and the second conductive substrate. Alternatively, the driving layer provides voltages for the first electrode and the second electrode at the same time, so that a potential difference is formed between the first electrode and the second electrode and the second conductive substrate, so as to form a vertical direction between the electrode layer and the second conductive substrate the electric field.

The first electrode and the second electrode are oppositely arranged along the thickness direction perpendicular to the electronic ink screen, that is, the first electrode and the second electrode are oppositely arranged in the horizontal direction. When the driving layer provides a voltage for the electrode layer, for example, the driving layer alone provides a voltage for the first electrode, so that a potential difference can be formed between the first electrode and the second electrode, so as to form a horizontal direction between the first electrode and the second electrode. electric field. Alternatively, the driving layer alone provides a voltage for the second electrode, so that a potential difference is formed between the first electrode and the second electrode, so as to form a horizontal electric field between the first electrode and the second electrode. Alternatively, the driving layer simultaneously provides voltages of different magnitudes to the first electrode and the second electrode, so that a potential difference can be formed between the first electrode and the second electrode, so as to form a horizontal electric field between the first electrode and the second electrode.

In a possible implementation manner, the driving layer includes: a substrate layer and at least one driving switch located on the substrate layer; the at least one driving switch provides a voltage for the electrode layer.

In a possible implementation manner, each of the ink accommodating chambers corresponds to a drive switch; the drive switch provides a voltage for the first electrode, or the drive switch provides a voltage for the second electrode.

In a possible implementation manner, each of the ink accommodating chambers corresponds to two drive switches; one of the two drive switches provides a voltage for the first electrode, and one of the two drive switches provides a voltage for the first electrode. The other one provides a voltage to the second electrode.

In a possible implementation manner, the functional layer is a black matrix layer; and the ink particles are white ink particles. By arranging the black matrix layer on the side of the ink display layer away from the second conductive substrate, when an electric field in a parallel direction is applied, a plurality of white ink particles in each ink accommodating cavity move to the inner side close to the ink accommodating cavity At this time, the color displayed by the electronic ink screen is the color of the black matrix layer, that is, the electronic ink screen is in a black state; when a vertical electric field is applied, a plurality of white ink particles in each ink accommodating cavity move to the Close to the inner top wall or inner bottom wall of the ink accommodating cavity, the color displayed by the electronic ink screen is the color presented by the white ink particles, that is, the electronic ink screen is in a white state; when the electric field in the parallel direction and the vertical direction are applied simultaneously When the direction of the electric field is applied, a plurality of white ink particles in each ink accommodating cavity are dispersed and arranged in the ink accommodating cavity, and the electronic ink screen displays a gray state at this time. That is to say, it is only necessary to arrange a plurality of white ink particles in each ink accommodating cavity, and by applying electric fields in different directions, the electronic ink screen can be displayed in a state of different colors, avoiding the need for two different colors in the prior art. The problem of movement interference caused by the mutual switching of the ink particles can improve the refresh speed of the e-ink screen, thereby shortening the response time of the e-ink screen.

In a possible implementation manner, the material used for the black matrix layer is any one or more of chrome or black resin.

In a possible implementation manner, in the first driving state, an electric field in a horizontal direction is formed between the first electrode and the second electrode, and the white ink particles move to a position close to the ink accommodating cavity. In the inner side wall, the electronic ink screen displays black; in the second driving state, a vertical electric field is formed between the electrode layer and the second conductive substrate, and the white ink particles move to close to the ink container. The electronic ink screen displays white; in the third driving state, a horizontal electric field is formed between the first electrode and the second electrode, and the electrode layer A vertical electric field is formed between the second conductive substrate and the white ink particles, the white ink particles are dispersed and arranged in the ink accommodating cavity, and the electronic ink screen displays a gray state.

In a possible implementation manner, the black matrix layer is located between the ink display layer and the first conductive substrate.

In a possible implementation manner, the black matrix layer is located between the electrode layer and the driving layer.

In a possible implementation manner, the functional layer is a reflective metal layer; and the ink particles are black ink particles. By arranging a reflective metal layer on the side of the ink display layer away from the second conductive substrate, when an electric field in a parallel direction is applied, a plurality of black ink particles in each ink accommodating cavity move to the inner side close to the ink accommodating cavity At this time, when the sunlight shines downward, it is reflected by the reflective metal layer, and the color displayed by the electronic ink screen is white, that is, the electronic ink screen is in a white state; when a vertical electric field is applied, each ink container A plurality of black ink particles moved to the inner top wall or inner bottom wall of the ink accommodating cavity. At this time, the color displayed by the electronic ink screen is the color presented by the black ink particles, that is, the electronic ink screen is in a black state; when at the same time When the electric field in the parallel direction and the electric field in the vertical direction are applied, a plurality of black ink particles in each ink accommodating cavity are dispersed and arranged in the ink accommodating cavity, and the electronic ink screen displays a gray state at this time. That is to say, it is only necessary to arrange a plurality of black ink particles in each ink accommodating cavity, and by applying electric fields in different directions, the electronic ink screen can be displayed in a state of different colors, avoiding the need for two different colors in the prior art. The problem of movement interference caused by the mutual switching of the ink particles can improve the refresh speed of the e-ink screen, thereby shortening the response time of the e-ink screen.

In a possible implementation manner, the material used for the reflective metal layer is aluminum or silver.

In a possible implementation manner, in a first driving state, a horizontal electric field is formed between the first electrode and the second electrode, and the black ink particles move to a position close to the ink accommodating cavity. On the inner side wall, the electronic ink screen displays white; in the second driving state, a vertical electric field is formed between the electrode layer and the second conductive substrate, and the black ink particles move to close to the ink container. The electronic ink screen displays black; in the third driving state, a horizontal electric field is formed between the first electrode and the second electrode, and the electrode layer A vertical electric field is formed between the second conductive substrate and the black ink particles, the black ink particles are dispersed and arranged in the ink accommodating cavity, and the electronic ink screen displays a gray state.

In a possible implementation manner, the reflective metal layer is located between the electrode layer and the driving layer.

In a possible implementation manner, the functional layer is a display screen.

In a possible implementation manner, the display screen is an organic light emitting diode display screen or a liquid crystal display screen.

In a possible implementation manner, the ink particles are white ink particles; the display screen is in a black state. By arranging a black organic light emitting diode display or liquid crystal display on the side of the ink display layer away from the second conductive substrate, when an electric field in a parallel direction is applied, a plurality of white inks in each ink accommodating cavity The particles move to the inner wall near the ink accommodating cavity, and the color displayed on the e-ink screen is the color displayed on the organic light-emitting diode display or the liquid crystal display, that is, the e-ink screen is in a black state; When the electric field is applied, a plurality of white ink particles in each ink accommodating cavity move to the inner top wall or inner bottom wall of the ink accommodating cavity. At this time, the color displayed on the electronic ink screen is the color presented by the white ink particles. That is, the electronic ink screen is in a white state; when the electric field in the parallel direction and the electric field in the vertical direction are applied at the same time, a plurality of white ink particles in each ink accommodating cavity are dispersed in the ink accommodating cavity, and the electronic ink screen is at this time. Displayed in gray. That is to say, it is only necessary to arrange a plurality of white ink particles in each ink accommodating cavity, and by applying electric fields in different directions, the electronic ink screen can be displayed in a state of different colors, avoiding the need for two different colors in the prior art. The problem of movement interference caused by the mutual switching of the ink particles can improve the refresh speed of the e-ink screen, thereby shortening the response time of the e-ink screen.

In a possible implementation manner, in the first driving state, an electric field in a horizontal direction is formed between the first electrode and the second electrode, and the white ink particles move to a position close to the ink accommodating cavity. In the inner side wall, the electronic ink screen displays black; in the second driving state, a vertical electric field is formed between the electrode layer and the second conductive substrate, and the white ink particles move to close to the ink container. The electronic ink screen displays white; in the third driving state, a horizontal electric field is formed between the first electrode and the second electrode, and the electrode layer A vertical electric field is formed between the second conductive substrate and the white ink particles, the white ink particles are dispersed and arranged in the ink accommodating cavity, and the electronic ink screen displays a gray state.

In a possible implementation manner, the ink particles are black ink particles; and the display screen is in a display state. By arranging an organic light emitting diode display screen or a liquid crystal display screen in a display state on the side of the ink display layer away from the second conductive substrate, when an electric field in a parallel direction is applied, a plurality of black inks in each ink accommodating cavity The particles move to the inner wall near the ink accommodating cavity. At this time, the color displayed by the electronic ink screen is the color displayed by the organic light emitting diode display or the liquid crystal display, that is, the electronic ink screen is in a display state (for example, a white state); when When the electric field in the vertical direction is applied, a plurality of black ink particles in each ink container move to the inner top wall or inner bottom wall of the ink container, and the color displayed on the electronic ink screen is black ink particles. The displayed color, that is, the electronic ink screen is in a black state; when the electric field in the parallel direction and the electric field in the vertical direction are applied at the same time, a plurality of black ink particles in each ink accommodating cavity are dispersed and arranged in the ink accommodating cavity, At this time, the e-ink screen displays a gray state. That is to say, it is only necessary to arrange a plurality of black ink particles in each ink accommodating cavity, and by applying electric fields in different directions, the electronic ink screen can be displayed in a state of different colors, avoiding the need for two different colors in the prior art. The problem of movement interference caused by the mutual switching of the ink particles can improve the refresh speed of the e-ink screen, thereby shortening the response time of the e-ink screen.

In a possible implementation manner, in a first driving state, a horizontal electric field is formed between the first electrode and the second electrode, and the black ink particles move to a position close to the ink accommodating cavity. On the inner side wall, the electronic ink screen displays white; in the second driving state, a vertical electric field is formed between the electrode layer and the second conductive substrate, and the black ink particles move to close to the ink container. The electronic ink screen displays black; in the third driving state, a horizontal electric field is formed between the first electrode and the second electrode, and the electrode layer A vertical electric field is formed between the second conductive substrate and the black ink particles, the black ink particles are dispersed and arranged in the ink accommodating cavity, and the electronic ink screen displays a gray state.

In a possible implementation manner, the display screen is located on a side of the first conductive substrate away from the ink display layer.

In a possible implementation manner, the ink display layer includes: a plurality of microcapsule structures, and the inner space of each of the microcapsule structures is formed as the ink accommodating cavity.

In a possible implementation manner, the ink display layer includes: a plurality of micro-cup structures, and the inner space of each of the micro-cup structures is formed as the ink accommodating cavity.

In a possible implementation manner, an electrophoresis base liquid is further provided in the ink accommodating cavity, and the ink particles move in the electrophoresis base liquid.

In a possible implementation manner, the material of the second conductive substrate and the electrode layer is indium tin oxide.

In a possible implementation manner, the driving switch is a thin film transistor.

In a second aspect, an embodiment of the present application provides a display device, which at least includes: any one of the electronic ink screens described above.

In the display device provided by the embodiment of the present application, the display device includes an ink display screen. In the electronic ink screen, a functional layer is provided on the side of the ink display layer away from the second conductive substrate. When an electric field in a vertical direction is applied, each ink A plurality of ink particles in the accommodating cavity move to the inner top wall or inner bottom wall of the ink accommodating cavity, and the color displayed by the electronic ink screen at this time is the color displayed by the ink particles in the ink accommodating cavity (that is, the color of the ink particles in the ink accommodating cavity). a color); when an electric field in a parallel direction is applied, a plurality of ink particles in each ink accommodating cavity move to the inner sidewall of the ink accommodating cavity, and the color displayed by the electronic ink screen at this time is generated by the functional layer Color (that is, the second color); when the electric field in the parallel direction and the electric field in the vertical direction are applied at the same time, a plurality of ink particles in each ink accommodating cavity are dispersed in the ink accommodating cavity. The displayed color is between the first color and the second color, that is, the e-ink screen displays a gray state. Therefore, in the embodiment of the present application, it is only necessary to arrange a plurality of ink particles of the same color in each ink accommodating cavity, and by applying electric fields in different directions, the electronic ink screen can be rendered in different colors, avoiding the need for the prior art. The problem of movement interference caused by the mutual switching of ink particles of two different colors can improve the refresh speed of the e-ink screen, thereby shortening the response time of the e-ink screen.

Description of drawings

1 is a schematic structural diagram of an electronic ink screen in the prior art;

FIG. 2 is a schematic structural diagram of an electronic ink screen provided by an embodiment of the present application;

3 is a schematic structural diagram of an electronic ink screen provided by an embodiment of the present application;

4A is a schematic structural diagram of the electronic ink screen shown in FIG. 2 when white ink particles move to the inner sidewall of the ink accommodating cavity;

4B is a schematic structural diagram of the electronic ink screen shown in FIG. 2 when the white ink particles move to the inner top wall of the ink accommodating cavity;

4C is a schematic structural diagram of the electronic ink screen shown in FIG. 2 when white ink particles are dispersed and arranged in the ink accommodating cavity;

5 is a schematic structural diagram of an electronic ink screen provided by an embodiment of the present application;

6 is a schematic structural diagram of an electronic ink screen provided by an embodiment of the present application;

7 is a top view of a black matrix layer in an electronic ink screen provided by an embodiment of the present application;

8 is a schematic structural diagram of an electronic ink screen provided by an embodiment of the present application;

9 is a schematic diagram of display states of different grayscales of an electronic ink screen according to an embodiment of the present application;

10 is a schematic structural diagram of an electronic ink screen provided by an embodiment of the application;

11A is a schematic structural diagram of the electronic ink screen shown in FIG. 10 when the white ink particles move to the inner side wall of the ink accommodating cavity;

11B is a schematic structural diagram of the electronic ink screen shown in FIG. 10 when the white ink particles move to the inner top wall of the ink accommodating cavity;

11C is a schematic structural diagram of the electronic ink screen shown in FIG. 10 when white ink particles are dispersed and arranged in the ink accommodating cavity;

12 is a top view of a black matrix layer in an electronic ink screen provided by an embodiment of the application;

13 is a schematic structural diagram of an electronic ink screen provided by an embodiment of the application;

14 is a schematic structural diagram of an electronic ink screen provided by an embodiment of the application;

15A is a schematic structural diagram of the electronic ink screen shown in FIG. 14 when the white ink particles move to the inner sidewall of the ink accommodating cavity;

15B is a schematic structural diagram of the electronic ink screen shown in FIG. 14 when the white ink particles move to the inner top wall of the ink accommodating cavity;

15C is a schematic structural diagram of the electronic ink screen shown in FIG. 14 when white ink particles are dispersed and arranged in the ink accommodating cavity;

16 is a schematic structural diagram of an electronic ink screen provided by an embodiment of the application;

17A is a schematic structural diagram of the electronic ink screen shown in FIG. 16 when the white ink particles move to the inner side wall of the ink accommodating cavity;

17B is a schematic structural diagram of the electronic ink screen shown in FIG. 16 when the white ink particles move to the inner top wall of the ink accommodating cavity;

FIG. 17C is a schematic structural diagram of the electronic ink screen shown in FIG. 16 when white ink particles are dispersed and arranged in the ink accommodating cavity.

Description of reference numbers:

100-electronic ink screen; 110-first conductive substrate; 111-driving layer;

1111-substrate layer; 1112-drive switch; 112-electrode group;

1121-first electrode; 1122-second electrode; 121-ink accommodating cavity;

1211-electrophoresis base fluid; 1221-white ink particles; 1222-black ink particles;

123-microcapsule structure; 1231-inner top wall; 1232-inner bottom wall;

1233-inner left side wall; 1234-inner right side wall; 124-microcup structure;

130-second conductive substrate; 140-black matrix layer; 141-first through hole;

150-reflective metal layer; 151-second through hole; 160-display screen;

D1-first gray state; D2-second gray state; D3-third gray state;

210 - Substrate.

Detailed ways

The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The following will describe the embodiments of the embodiments of the present application in detail with reference to the accompanying drawings.

At present, the research of electronic ink screen technology is mainly divided into electrophoretic display technology, cholesteric liquid crystal technology, electrowetting technology, rotating ball technology, electrochromic technology and MEMS technology. Among them, electrophoretic display technology has the advantages of wide viewing angle, high contrast, high reflectivity, etc., and has become the most mature electronic ink screen technology at present, and black and white electrophoretic display technology has achieved mass production.

The existing electronic ink screen is a bistable display screen. When the screen is statically displayed, the driving circuit does not consume power, and when the screen is refreshed, the driving circuit consumes a certain amount of power. As shown in FIG. 1 , in the related art, a common electronic ink screen is composed of two substrates 210 , and an electronic ink composed of numerous microcapsule structures 123 is arranged between the two substrates 210 . The electronic ink is made of positively charged electronic ink. Many black ink particles 1222 and negatively charged many white ink particles 1221 are sealed in the microcapsule structure 123 which is liquid inside. Because the ink particles of different colors will move in different directions due to the difference of the applied electric field, the ink particles of different colors are arranged in an orderly manner, thus showing a black and white visualization effect.

However, there are two kinds of ink particles, black and white, in the same microcapsule structure 123. Since the black ink particles 1222 and the white ink particles 1221 have different charges, they will interfere with each other when they move in the liquid microcapsule structure 123. , resulting in a slower refresh rate of the e-ink screen, resulting in a longer response time for the e-ink screen.

Based on this, as shown in FIG. 2 and FIG. 3 , an embodiment of the present application provides a new electronic ink screen 100 for solving the above technical problems. Among them, the electronic ink screen 100 provided in the embodiment of the present application can be applied to the solution of the microcapsule structure 123 (refer to FIG. 2 ), and can also be applied to the solution of the microcup structure 124 (refer to FIG. 3 ). The example is not limited to this.

It should be noted that when the electronic ink screen 100 is suitable for the solution of the microcapsule structure 123, as shown in FIG. 2, the ink display layer may include a plurality of microcapsule structures 123, wherein the inner space of each microcapsule structure 123 is formed For the ink accommodating chambers 121 , each ink accommodating chamber 121 is provided with a plurality of white ink particles 1221 . When the electronic ink screen 100 is suitable for the solution of the micro-cup structure 124, as shown in FIG. 3, the ink display layer may include a plurality of micro-cup structures 124, wherein the inner space of each micro-cup structure 124 is formed as an ink accommodating cavity 121 , a plurality of white ink particles 1221 are arranged in each ink accommodating cavity 121 .

In order to simplify the description and facilitate understanding, the electronic ink screen 100 adopts the microcapsule structure 123 for description in subsequent embodiments of the present application. Of course, the embodiments of the present application are not limited to the solution applied to the microcapsule structure 123, and can also be applied to the solution of the microcup structure 124 or any other structure.

The specific structure of the electronic ink screen 100 will be described in detail below with reference to the accompanying drawings, taking different embodiments as examples.

Example 1

Referring to FIG. 2 , an embodiment of the present application provides an electronic ink screen 100 . The electronic ink screen 100 may include at least a first conductive substrate 110 , an ink display layer and a second conductive substrate 130 , which are arranged in layers. The layer is located between the first conductive substrate 110 and the second conductive substrate 130 , and the second conductive substrate 130 is located above the first conductive substrate 110 .

The material of the second conductive substrate 130 may be indium tin oxide (ITO). Indium tin oxide has good conductivity and transparency.

2, the ink display layer may have a plurality of mutually independent ink accommodating cavities 121, and the ink accommodating cavities 121 are provided with a plurality of ink particles of the same color, and the ink particles are used to display the first color. Specifically, each ink accommodating cavity 121 may be provided with a plurality of black ink particles 1222 , or each ink accommodating cavity 121 may be provided with a plurality of white ink particles 1221 (see FIG. 2 ).

It can be understood that an electrophoresis base fluid 1211 may also be provided in the ink accommodating chamber 121 , and the electrophoresis base fluid 1211 is transparent, and ink particles (eg, white ink particles in FIG. 2 ) move freely in the electrophoresis base fluid 1211 .

In the embodiment of the present application, the electronic ink screen 100 may further include: a functional layer, wherein the functional layer is used to display the second color, and the functional layer may be located on the side of the ink display layer away from the second conductive substrate 130 .

In this way, when the electric field in the vertical direction is applied, the plurality of ink particles in each ink accommodating cavity 121 move to the inner top wall 1231 or the inner bottom wall 1232 of the ink accommodating cavity 121 . The displayed color is the color (ie, the first color) presented by the ink particles in the ink accommodating cavity 121 . When an electric field in a parallel direction is applied, a plurality of ink particles in each ink accommodating cavity 121 move to the inner sidewall of the ink accommodating cavity 121, and the color displayed on the electronic ink screen 100 at this time is the color produced by the functional layer (ie the second color). When the electric field in the parallel direction and the electric field in the vertical direction are applied at the same time, a plurality of ink particles in each ink accommodating cavity 121 are dispersed and arranged in the ink accommodating cavity 121, and the color displayed on the electronic ink screen 100 is between Between the first color and the second color, that is, the electronic ink screen 100 displays a gray state.

Therefore, in the embodiment of the present application, it is only necessary to set a plurality of ink particles of the same color in each ink accommodating cavity 121, and by applying electric fields in different directions, the electronic ink screen 100 can be rendered in different colors, thereby avoiding the occurrence of current problems. In the prior art, the problem of movement interference caused by the mutual switching of ink particles of two different colors can improve the refresh speed of the electronic ink screen 100 , thereby shortening the response time of the electronic ink screen 100 .

As shown in FIG. 2 , in the embodiment of the present application, the functional layer may be a black matrix layer 140 , and the ink particles may be white ink particles 1221 .

In this way, when an electric field in a parallel direction is applied, the plurality of white ink particles 1221 in each ink accommodating cavity 121 move to be close to the inner side walls of the ink accommodating cavity 121 (eg, inner front side wall, inner rear side wall, inner left side wall, inner left side wall, etc.). side wall 1233, or inner right side wall 1234), for example, in FIG. At this time, sunlight radiates downward through the microcapsule structure 123 and is absorbed by the black matrix layer 140 , and the color displayed by the electronic ink screen 100 is the color of the black matrix layer 140 , that is, the electronic ink screen 100 is in a black state.

When a vertical electric field is applied, the plurality of white ink particles 1221 in each ink accommodating cavity 121 move to the inner top wall 1231 or the inner bottom wall 1232 of the ink accommodating cavity 121. For example, in FIG. 4B, the ink The plurality of white ink particles 1221 in the accommodating cavity 121 move to be close to the inner top wall 1231 of the ink accommodating cavity 121 . At this time, sunlight irradiates downward through the microcapsule structure 123 and is reflected by the white ink particles 1221 . The color displayed on the electronic ink screen 100 is the color displayed by the white ink particles 1221 , that is, the electronic ink screen 100 is in a white state.

When the electric field in the parallel direction and the electric field in the vertical direction are simultaneously applied, a plurality of white ink particles 1221 in each ink accommodating cavity 121 are dispersed in the ink accommodating cavity 121 (see FIG. 4C ). The ink screen 100 displays a gray state.

That is to say, in the embodiment of the present application, only a plurality of white ink particles 1221 need to be arranged in each ink accommodating cavity 121, and by applying electric fields in different directions, the electronic ink screen 100 can be displayed in different colors, avoiding the occurrence of In the prior art, black particles and white particles have different electric charges, and they will interfere with each other when they move. Therefore, the embodiment of the present application can improve the refresh speed of the electronic ink screen 100, thereby significantly shortening the response of the electronic ink screen 100. time.

In addition, in the prior art, when the display screen needs to be switched, such as switching from black to white, some black particles remain in the screen because they have no time to move, and are mixed with white particles, resulting in the occurrence of afterimages and affecting the contrast of the screen. . The embodiment of the present application only needs to set a plurality of white ink particles 1221 in each ink accommodating cavity 121, which avoids the problem of mutual switching between ink particles of two different colors, thus avoids the occurrence of afterimages, and helps to improve the electronic The screen contrast of the ink screen 100 optimizes the user experience.

It should be noted that the black matrix is a light absorbing material, and the material used for the black matrix (Black Matrix, BM) layer can be any one or more of chromium (Cr, Crox) or black resin (Black Resin). .

In addition, as shown in FIG. 2 , in the embodiment of the present application, the first conductive substrate 110 may include: a driving layer 111 and an electrode layer, wherein the driving layer 111 provides a voltage for the electrode layer to form a vertical electric field and a horizontal direction of the electric field. Wherein, the material of the electrode layer may be indium tin oxide. Indium tin oxide is used as a transparent electrode material, and its light transmittance can be above 90%.

Specifically, the electrode layer may include: at least one electrode group 112 , and each ink containing cavity 121 corresponds to one electrode group 112 . For example, the three ink accommodating cavities 121 in FIG. 2 correspond to the electrode groups 112 respectively. Wherein, each electrode group 112 may include: a first electrode 1121 and a second electrode 1122, the first electrode 1121 and the second electrode 1122 are oppositely disposed along the thickness direction perpendicular to the electronic ink screen 100, and the driving layer 111 is an electrode The group 112 provides a voltage so that a vertical electric field is formed between the electrode group 112 and the second conductive substrate 130 , and a horizontal electric field is formed between the first electrode 1121 and the second electrode 1122 . The electric field in the vertical direction is used to control the vertical movement of the white ink particles 1221 in the ink accommodating cavity 121 , and the electric field in the horizontal direction is used to control the white ink particles 1221 in the ink accommodating cavity 121 to move in the horizontal direction. sports.

It can be understood that the driving layer 111 provides a voltage for the electrode group 112 , so that a potential difference can be formed between the electrode group 112 and the second conductive substrate 130 to form a vertical electric field between the electrode group 112 and the second conductive substrate 130 .

For example, the driving layer 111 alone provides a voltage for the first electrode 1121, so that a potential difference can be formed between the first electrode 1121 and the second conductive substrate 130 to form a vertical electric field between the electrode group 112 and the second conductive substrate 130 . Alternatively, the driving layer 111 alone provides a voltage for the second electrode 1122 , so that a potential difference can be formed between the second electrode 1122 and the second conductive substrate 130 to form a vertical electric field between the electrode group 112 and the second conductive substrate 130 . Alternatively, the driving layer 111 provides a voltage to the first electrode 1121 and the second electrode 1122 at the same time, so that a potential difference can be formed between the first electrode 1121 and the second conductive substrate 130 and between the second electrode 1122 and the second conductive substrate 130 to form a potential difference. An electric field in a vertical direction is formed between the electrode group 112 and the second conductive substrate 130 .

In addition, it should be noted that the driving layer 111 provides a voltage for the first electrode 1121 and the second electrode 1122 at the same time, so that the white ink particles 1221 move to the inner top wall 1231 or the inner bottom wall 1232 close to the ink accommodating cavity 121 as an example , when all the white ink particles 1221 are required to be located close to the inner top wall 1231 or the inner bottom wall 1232 of the ink accommodating cavity 1021, that is, when the electronic ink screen 100 is in a pure black state, the first electrode 1121 and the second electrode 1122 are applied voltage can be the same. When all the white ink particles 1221 do not need to be located close to the inner top wall 1231 or the inner bottom wall 1232 of the ink accommodating cavity 1021, for example, some of the white ink particles 1221 can be located in the middle, upper middle or lower middle of the ink accommodating cavity 1021. The voltages applied to the first electrode 1121 and the second electrode 1122 may be different.

In the embodiment of the present application, the first electrode 1121 and the second electrode 1122 are arranged opposite to each other along the thickness direction perpendicular to the electronic ink screen 100 , that is, the first electrode 1121 and the second electrode 1122 are arranged opposite to each other in the horizontal direction.

In this way, when the driving layer 111 provides a voltage for the electrode group 112, for example, the driving layer 111 provides a voltage for the first electrode 1121 alone, so that a potential difference can be formed between the first electrode 1121 and the second electrode 1122, so as to form a potential difference between the first electrode 1121 and the second electrode 1122. A horizontal electric field is formed between the second electrodes 1122 . Alternatively, the driving layer 111 alone provides a voltage for the second electrode 1122 , so that a potential difference can be formed between the first electrode 1121 and the second electrode 1122 to form a horizontal electric field between the first electrode 1121 and the second electrode 1122 . Alternatively, the driving layer 111 provides the first electrode 1121 and the second electrode 1122 with voltages of different magnitudes at the same time, so that a potential difference can be formed between the first electrode 1121 and the second electrode 1122 to form a potential difference between the first electrode 1121 and the second electrode 1122 A horizontal electric field is formed between them.

It should be noted that, generally, when the driving layer 111 alone provides a voltage for the first electrode 1121, a potential difference can be formed between the first electrode 1121 and the second conductive substrate 130, so that the electrode group 112 and the second conductive substrate 130 can form a potential difference. A vertical electric field can also be formed between the first electrode 1121 and the second electrode 1122 to form a potential difference between the first electrode 1121 and the second electrode 1122 to form a horizontal electric field between the first electrode 1121 and the second electrode 1122 . At this time, the voltage value can be flexibly adjusted according to the actual distance between the first electrode 1121 and the second conductive substrate 130 and the actual distance between the first electrode 1121 and the second electrode 1122, so that only the electrode group 112 An electric field in a vertical direction is formed with the second conductive substrate 130 , or an electric field in a horizontal direction is formed only between the first electrode 1121 and the second electrode 1122 .

For example, in FIG. 2 , the distance between the first electrode 1121 and the second conductive substrate 130 is relatively large, and the distance between the first electrode 1121 and the second electrode 1122 is relatively small. When a small voltage is supplied, an electric field in a horizontal direction is formed between the first electrode 1121 and the second electrode 1122 . When a larger voltage is applied to the first electrode 1121 , an electric field in a vertical direction is formed between the electrode group 112 and the second conductive substrate 130 .

In addition, in the embodiment of the present application, the positive and negative polarities of the voltage provided by the driving layer 111 to the electrode group 112 will also affect the actual motion state of the white ink particles 1221 .

It is understood that the white ink particles 1221 carry a negative charge. Taking the vertical electric field formed between the electrode group 112 and the second conductive substrate 130 as an example, when the voltage provided by the driving layer 111 for the electrode group 112 is a positive voltage, the potential value of the electrode group 112 is greater than that of the second conductive substrate 130 Therefore, a potential difference is formed between the electrode group 112 and the second conductive substrate 130, and a vertical electric field is formed between the electrode group 112 and the second conductive substrate 130. The electric field starts from the electrode group 112 and goes toward the second conductive substrate 130. The direction of the conductive substrate 130 (ie, from bottom to top) extends. Since the white ink particles 1221 carry negative charges, the white ink particles 1221 will move to be close to the inner bottom wall 1232 of the ink accommodating cavity 121 , and the electronic ink screen 100 is in a white state at this time.

When the voltage provided by the driving layer 111 for the electrode group 112 is a negative voltage, the potential value of the electrode group 112 is smaller than the potential value of the second conductive substrate 130, so that a potential difference is formed between the electrode group 112 and the second conductive substrate 130, and the electrode A vertical electric field is formed between the group 112 and the second conductive substrate 130 , and the electric field is generated from the second conductive substrate 130 and extends toward the electrode group 112 (ie, from top to bottom). Since the white ink particles 1221 carry negative charges, the white ink particles 1221 will move to the inner top wall 1231 of the ink accommodating cavity 121 , and the electronic ink screen 100 is also in a white state at this time.

In addition, taking the electric field in the horizontal direction formed between the first electrode 1121 and the second electrode 1122 as an example, when the voltage provided by the driving layer 111 for the first electrode 1121 is a positive voltage, the potential value of the first electrode 1121 is greater than that of the second electrode 1121. The potential value of the electrode 1122, in this way, a potential difference is formed between the first electrode 1121 and the second electrode 1122, and a horizontal electric field is formed between the first electrode 1121 and the second electrode 1122. The electric field starts from the first electrode 1121 and goes toward the The direction of the second electrode 1122 (ie, from left to right) extends. Since the white ink particles 1221 carry negative charges, the white ink particles 1221 will move to the left side wall of the ink accommodating cavity 121 , and at this time, the electronic ink screen 100 is in a black state.

When the voltage provided by the driving layer 111 for the first electrode 1121 is a negative voltage, the potential value of the first electrode 1121 is smaller than the potential value of the second electrode 1122, so that a potential difference is formed between the first electrode 1121 and the second electrode 1122, An electric field in a horizontal direction is formed between the first electrode 1121 and the second electrode 1122 . The electric field is generated from the second electrode 1122 and extends toward the first electrode 1121 (ie, from right to left). Since the white ink particles 1221 carry negative charges, the white ink particles 1221 will move to the right side wall of the ink accommodating cavity 121 , and the electronic ink screen 100 is also in a black state at this time.

Continuing to refer to FIG. 2 , the driving layer 111 may include: a substrate layer 1111 and at least one driving switch 1112 , wherein the at least one driving switch 1112 is located on the substrate layer 1111 , and the at least one driving switch 1112 is used to provide the electrode group 112 with Voltage.

In some embodiments, the driving switch 1112 may be a thin film transistor (Thin Film Transistor, TFT). Thin film transistor means that each liquid crystal pixel on the liquid crystal display is driven by a thin film transistor integrated behind it. Thereby, the screen information can be displayed at high speed, high brightness and high contrast ratio.

In addition, it should be noted that, in this embodiment of the present application, the specific implementation manners when at least one drive switch 1112 provides a voltage for the electrode group 112 includes the following two possible implementation manners:

A possible implementation is: as shown in FIG. 2 , the number of driving switches 1112 corresponding to each microcapsule structure 123 is one, and the driving switch 1112 provides a voltage for the first electrode 1121 , or the driving switch 1112 is The second electrode 1122 provides a voltage. The driving switch 1112 provides a voltage for the first electrode 1121 alone, so that a potential difference can be formed between the first electrode 1121 and the second electrode 1122 to form a horizontal electric field between the first electrode 1121 and the second electrode 1122 . Alternatively, the driving switch 1112 alone provides a voltage for the second electrode 1122, which can also form a potential difference between the first electrode 1121 and the second electrode 1122, so as to form a horizontal electric field between the first electrode 1121 and the second electrode 1122 .

Another possible implementation is: as shown in FIG. 5 , the number of driving switches 1112 corresponding to each microcapsule structure 123 is two, and one of the two driving switches 1112 provides a voltage for the first electrode 1121 , the other of the two drive switches 1112 provides a voltage to the second electrode 1122 . In this way, when one driving switch 1112 is turned on, the turned on driving switch 1112 can provide a voltage for the first electrode 1121 alone, so that a potential difference can be formed between the first electrode 1121 and the second electrode 1122, so as to form a potential difference between the first electrode 1121 and the second electrode 1121. An electric field in a horizontal direction is formed between the electrodes 1122 . Alternatively, the turned-on driving switch 1112 can provide a voltage to the second electrode 1122 alone, so that a potential difference can be formed between the first electrode 1121 and the second electrode 1122, so as to form a horizontal direction between the first electrode 1121 and the second electrode 1122. electric field.

When the two drive switches 1112 are turned on at the same time, the two drive switches 1112 can respectively provide the first electrode 1121 and the second electrode 1122 with voltages of different magnitudes, so that a potential difference can be formed between the first electrode 1121 and the second electrode 1122, In order to form a horizontal electric field between the first electrode 1121 and the second electrode 1122 .

It can be understood that, in the embodiment of the present application, in the first driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), the first electrode 1121 A horizontal electric field can be formed between the second electrode 1122 and the white ink particles 1221 move to the inner side wall of the ink accommodating cavity 121, and the electronic ink screen 100 displays black. In the second driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), and a vertical direction is formed between the electrode group 112 and the second conductive substrate 130 . When the electric field is applied, the white ink particles 1221 move to the inner top wall 1231 or the inner bottom wall 1232 of the ink accommodating cavity 121 , and the electronic ink screen 100 displays white at this time. In the third driving state, that is, the driving layer 111 provides a voltage to the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), and a horizontal electric field is formed between the first electrode 1121 and the second electrode 1122 , and a vertical electric field is formed between the electrode group 112 and the second conductive substrate 130 , the white ink particles 1221 are dispersed in the ink accommodating cavity 121 , and the electronic ink screen 100 displays a gray state.

In the embodiment of the present application, the black matrix layer 140 may be located between the ink display layer and the first conductive substrate 110 (see FIG. 2 ). Alternatively, as shown in FIG. 6 , the black matrix layer 140 may also be located between the electrode layer and the driving layer 111 . An electrode lead (not shown in the figure) is connected between the electrode group 112 and the driving layer 111 , and the driving layer 111 provides a driving voltage for the electrode group 112 through the electrode lead. At this time, it is generally necessary to open a first through hole 141 on the black matrix layer 140 (see FIG. 7 ), so that the electrode leads can pass through the first through hole 141 on the black matrix layer 140 to realize that the driving layer 111 is the electrode group 112 Provide the drive voltage.

Of course, in some other embodiments, as shown in FIG. 8 , the black matrix layer 140 may also be located on the side of the first conductive substrate 110 away from the second conductive substrate 130 , which is not limited in this embodiment of the present application.

In addition, it should be noted that, in the embodiment of the present application, when the electronic ink screen 100 displays a gray state, it may be gray in various forms. Specifically, the magnitude of the electric field intensity can be adjusted according to the quantitative control of the applied voltage, so that the electronic ink screen 100 can display gray states of different shades. Illustratively, FIG. 9 shows three different modalities of grayscale (ie, a first gray state D1, a second gray state D2, and a third gray state D3). As shown in FIG. 9 , from left to right, the gray state color displayed by the electronic ink screen 100 is darker and darker.

Embodiment 2

The embodiment of the present application also provides an electronic ink screen 100 with another structure. The difference between the second embodiment and the second embodiment is that the specific materials of the functional layers are different.

Referring to FIG. 10 , in the embodiment of the present application, the functional layer may be a reflective metal layer 150 , and the ink particles may be black ink particles 1222 .

In this way, when an electric field in a parallel direction is applied, the plurality of black ink particles 1222 in each ink accommodating cavity 121 move to be close to the inner wall of the ink accommodating cavity 121. For example, in FIG. 11A , the black ink particles 1222 in the ink accommodating cavity 121 The plurality of black ink particles 1222 move to be close to the inner left side wall 1233 of the ink accommodating cavity 121 . At this time, when sunlight passes through the microcapsule structure 123 and irradiates downward, it is reflected by the reflective metal layer 150 , and the color displayed by the electronic ink screen 100 is white, that is, the electronic ink screen 100 is in a white state.

When a vertical electric field is applied, the plurality of black ink particles 1222 in each ink accommodating cavity 121 move to the inner top wall 1231 or the inner bottom wall 1232 of the ink accommodating cavity 121. For example, in FIG. 11B, the ink The plurality of black ink particles 1222 in the accommodating cavity 121 move to be close to the inner top wall 1231 of the ink accommodating cavity 121 . At this time, sunlight radiates downward through the microcapsule structure 123 and is absorbed by the black ink particles 1222 . The color displayed on the electronic ink screen 100 is the color displayed by the black ink particles 1222 , that is, the electronic ink screen 100 is in a black state.

When the electric field in the parallel direction and the electric field in the vertical direction are applied at the same time, the plurality of black ink particles 1222 in each ink containing cavity 121 are dispersed and arranged in the ink containing cavity 121 (see FIG. 11C ). The ink screen 100 displays a gray state.

That is to say, in this embodiment of the present application, only a plurality of black ink particles 1222 need to be arranged in each ink accommodating cavity 121, and by applying electric fields in different directions, the electronic ink screen 100 can be rendered in different colors, avoiding the occurrence of In the prior art, the problem of movement interference caused by the mutual switching of ink particles of two different colors can improve the refresh speed of the electronic ink screen 100 , thereby shortening the response time of the electronic ink screen 100 .

In this embodiment of the present application, the reflective metal layer 150 may be located between the electrode layer and the driving layer 111 (see FIG. 10 ). An electrode lead (not shown in the figure) is connected between the electrode group 112 and the driving layer 111 , and the driving layer 111 provides a driving voltage for the electrode group 112 through the electrode lead. At this time, it is generally necessary to open a second through hole 151 on the reflective metal layer 150 (see FIG. 12 ), so that the electrode leads can pass through the second through hole 151 on the reflective metal layer 150 to realize that the driving layer 111 is the electrode group 112 Provide the drive voltage.

Certainly, in some other embodiments, as shown in FIG. 13 , the reflective metal layer 150 may also be located on the side of the first conductive substrate 110 away from the second conductive substrate 130 , which is not limited in this embodiment of the present application.

It should be noted that the material used for the reflective metal layer 150 may be aluminum or silver.

It can be understood that, in the embodiment of the present application, in the first driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), the first electrode 1121 A horizontal electric field can be formed between the second electrode 1122 and the black ink particles 1222 move to the inner side wall of the ink accommodating cavity 121, and the electronic ink screen 100 displays white. In the second driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), and a vertical direction is formed between the electrode group 112 and the second conductive substrate 130 . When the electric field is applied, the black ink particles 1222 move to the inner top wall 1231 or the inner bottom wall 1232 of the ink accommodating cavity 121 , and the electronic ink screen 100 displays black. In the third driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), and a horizontal electric field is formed between the first electrode 1121 and the second electrode 1122 , and a vertical electric field is formed between the electrode group 112 and the second conductive substrate 130 , the black ink particles 1222 are dispersed in the ink accommodating cavity 121 , and the electronic ink screen 100 displays a gray state.

Other technical features are the same as those in the first embodiment, and can achieve the same technical effects, and will not be repeated here.

Embodiment 3

The embodiment of the present application also provides an electronic ink screen 100 with another structure. Compared with the first embodiment and the second embodiment, the third embodiment is different in that the specific materials of the functional layer are different.

Referring to FIG. 14 , in this embodiment of the present application, the functional layer may be a display screen 160 . Specifically, the display screen 160 may be an organic light-emitting diode display screen 160 (Organic Light-Emitting Diode, OLED) or a liquid crystal display screen 160 (Liquid Crystal Display, LCD).

It should be noted that, as shown in FIG. 14 , in the embodiment of the present application, the ink particles may be white ink particles 1221 , and the display screen 160 may be in a black state.

In this way, when an electric field in a parallel direction is applied, the plurality of white ink particles 1221 in each ink accommodating cavity 121 move to be close to the inner wall of the ink accommodating cavity 121. For example, in FIG. 15A , the ink particles in the ink accommodating cavity 121 The plurality of white ink particles 1221 move to be close to the inner left side wall 1233 of the ink accommodating cavity 121 . At this time, the color displayed on the electronic ink screen 100 is the color displayed on the organic light emitting diode display screen 160 or the liquid crystal display screen 160 , that is, the electronic ink screen 100 is in a black state.

When a vertical electric field is applied, the plurality of white ink particles 1221 in each ink containing cavity 121 move to the inner top wall 1231 or the inner bottom wall 1232 of the ink containing cavity 121 , for example, in FIG. 15B , each The plurality of white ink particles 1221 in each ink accommodating cavity 121 move to be close to the inner top wall 1231 of the ink accommodating cavity 121 . At this time, the color displayed by the electronic ink screen 100 is the color displayed by the white ink particles 1221 , that is, the electronic ink screen 100 is in a white state.

When the electric field in the parallel direction and the electric field in the vertical direction are simultaneously applied, a plurality of white ink particles 1221 in each ink accommodating cavity 121 are dispersed in the ink accommodating cavity 121 (see FIG. 15C ), and the electrons The ink screen 100 displays a gray state.

That is to say, it is only necessary to set a plurality of white ink particles 1221 in each ink accommodating cavity 121, and by applying electric fields in different directions, the electronic ink screen 100 can be rendered in different colors, thereby avoiding the two-color state of the prior art. The problem of movement interference caused by the mutual switching of ink particles of different colors can improve the refresh speed of the electronic ink screen 100 , thereby shortening the response time of the electronic ink screen 100 .

It should be noted that, in some embodiments, as shown in FIG. 14 , the display screen 160 may be located on the side of the first conductive substrate 110 away from the ink display layer.

Specifically, in the embodiment of the present application, in the first driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), the first electrode 1121 and the second electrode 1122 An electric field in a horizontal direction is formed between the two electrodes 1122 , the white ink particles 1221 move to the inner sidewall of the ink accommodating cavity 121 , and the electronic ink screen 100 displays black. In the second driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), and a vertical direction is formed between the electrode group 112 and the second conductive substrate 130 . When the electric field is applied, the white ink particles 1221 move to the inner top wall 1231 or the inner bottom wall 1232 of the ink accommodating cavity 121 , and the electronic ink screen 100 displays white color. In the third driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), and a horizontal electric field is formed between the first electrode 1121 and the second electrode 1122 , and a vertical electric field is formed between the electrode group 112 and the second conductive substrate 130 , the white ink particles 1221 are dispersed in the ink accommodating cavity 121 , and the electronic ink screen 100 displays a gray state.

Other technical features are the same as those of the first and second embodiments, and can achieve the same technical effects, which will not be repeated here.

Embodiment 4

The embodiment of the present application also provides an electronic ink screen 100 with another structure. Compared with the third embodiment, the fourth embodiment is different in that when the functional layer is the display screen 160, the display state of the display screen 160 does not change. same.

Referring to FIG. 16 , in this embodiment of the present application, the ink particles may be black ink particles 1222 , and the display screen 160 may be in a display state.

In this way, when an electric field in a parallel direction is applied, the plurality of black ink particles 1222 in each ink accommodating cavity 121 move to be close to the inner wall of the ink accommodating cavity 121. For example, in FIG. 17A , the black ink particles 1222 in the ink accommodating cavity 121 The plurality of black ink particles 1222 move to be close to the inner left side wall 1233 of the ink accommodating cavity 121 . At this time, the color displayed on the electronic ink screen 100 is the color displayed on the organic light emitting diode display screen 160 or the liquid crystal display screen 160 , that is, the electronic ink screen 100 is in a display state (eg, a white state).

When a vertical electric field is applied, the plurality of black ink particles 1222 in each ink containing cavity 121 move to the inner top wall 1231 or the inner bottom wall 1232 of the ink containing cavity 121. For example, in FIG. 17B, the ink The plurality of black ink particles 1222 in the accommodating cavity 121 move to be close to the inner top wall 1231 of the ink accommodating cavity 121 . At this time, the color displayed by the electronic ink screen 100 is the color displayed by the black ink particles 1222 , that is, the electronic ink screen 100 is in a black state.

When the electric field in the parallel direction and the electric field in the vertical direction are simultaneously applied, a plurality of black ink particles 1222 in each ink accommodating cavity 121 are dispersed in the ink accommodating cavity 121 (see FIG. 17C ). The ink screen 100 displays a gray state.

That is to say, it is only necessary to set a plurality of black ink particles 1222 in each ink accommodating cavity 121 , and by applying electric fields in different directions, the electronic ink screen 100 can be rendered in different colors, avoiding the two-color state of the prior art. The problem of movement interference caused by the mutual switching of ink particles of different colors can improve the refresh speed of the electronic ink screen 100 , thereby shortening the response time of the electronic ink screen 100 .

Specifically, in the embodiment of the present application, in the first driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), the first electrode 1121 and the second electrode 1122 An electric field in a horizontal direction is formed between the two electrodes 1122 , the black ink particles 1222 move to the inner sidewall of the ink accommodating cavity 121 , and the electronic ink screen 100 displays white. In the second driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), and a vertical direction is formed between the electrode group 112 and the second conductive substrate 130 . The electric field causes the black ink particles 1222 to move to the inner top wall 1231 or the inner bottom wall 1232 of the ink accommodating cavity 121 , and the electronic ink screen 100 displays black. In the third driving state, that is, the driving layer 111 provides a voltage for the electrode group 112 (at least one of the first electrode 1121 and the second electrode 1122 ), and a horizontal electric field is formed between the first electrode 1121 and the second electrode 1122 , and a vertical electric field is formed between the electrode group 112 and the second conductive substrate 130 , the black ink particles 1222 are dispersed in the ink accommodating cavity 121 , and the electronic ink screen 100 displays a gray state.

In addition, in the related art, the electronic ink screen 100 can only support simple colors and grayscales, for example, it can only display black and white, and cannot display very rich colors, resulting in poor user experience. In the embodiment of the present application, when the display screen 160 is in the display state, the display color of the display screen 160 can be designed to be various colors, such as light yellow, light blue or light green, so as to expand the display color of the ink display screen 160 area. In addition, by flexibly switching the display states of the ink display layer and the display screen 160 (eg, OLED or LCD), it is helpful for the ink display screen 160 to achieve a full color gamut display effect.

Moreover, since only a plurality of ink particles of the same color are arranged in each ink accommodating cavity 121, when the electronic ink screen 100 is in a transparent state, the overall transmittance of the electronic ink screen 100 can be significantly improved, especially the reduction can be reduced. The influence of the small microcapsule structure 123 on the normal display of the display screen 160 (eg, OLED or LCD).

Other technical features are the same as those of the first embodiment, the second embodiment and the third embodiment, and can achieve the same technical effect, and will not be repeated here.

Embodiment 5

On the basis of the first embodiment, the second embodiment, the third embodiment or the fourth embodiment, an embodiment of the present application provides a display device, and the display device may at least include: the electronic ink screen 100 in any of the above embodiments.

It should be noted that the display device can be an electronic label, an electronic book, a wearable device (such as a watch), an electronic reader, a navigator, an electronic photo frame, a household appliance (such as an alarm clock with double-sided display or transparent display), a supermarket For various products or components with display functions such as billboards in the market, the specific application scenarios of the ink display screen 160 are not limited in the embodiments of the present application.

In the display device provided by the embodiments of the present application, the display device may include an ink display screen 160. In the electronic ink screen 100, a functional layer is provided on the side of the ink display layer away from the second conductive substrate 130. When an electric field in a parallel direction is applied, The plurality of ink particles in each ink accommodating cavity 121 move to the inner side wall of the ink accommodating cavity 121, and the color displayed by the electronic ink screen 100 at this time is the color generated by the functional layer. When the electric field in the vertical direction is applied At this time, a plurality of ink particles in each ink accommodating cavity 121 move to the inner top wall 1231 or the inner bottom wall 1232 close to the ink accommodating cavity 121 . At this time, the color displayed on the electronic ink screen 100 is the ink accommodating cavity 121 When the electric field in the parallel direction and the electric field in the vertical direction are applied at the same time, a plurality of ink particles in each ink accommodating cavity 121 are dispersed in the ink accommodating cavity 121, and the electronic The ink screen 100 displays a gray state. Therefore, in the embodiment of the present application, it is only necessary to set a plurality of ink particles of the same color in each ink accommodating cavity 121, and by applying electric fields in different directions, the electronic ink screen 100 can be rendered in different colors, thereby avoiding the occurrence of current problems. In the prior art, the mutual switching of ink particles of two different colors causes movement interference, which can improve the refresh speed of the electronic ink screen 100 , thereby shortening the response time of the electronic ink screen 100 .

In addition, the display device also has the advantage of low power consumption compared with liquid crystal display devices, OLED display devices and the like in the prior art.

The other technical features are the same as those of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, and can achieve the same technical effect, which will not be repeated here.

In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a The indirect connection through an intermediate medium may be the internal communication of the two elements or the interaction relationship between the two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

The devices or elements referred to in the embodiments of the present application or implied must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present application. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, while It is not necessary to describe a particular order or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances such that embodiments of the embodiments of the application described herein can be implemented, for example, in sequences other than those illustrated or described herein. Furthermore, the terms "may include" and "have" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device comprising a series of steps or units is not necessarily limited to those expressly listed but may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, but not to limit them. It should be understood that it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the embodiments of the present application The scope of the technical solutions of each embodiment.

Claims (22)

1. An electronic ink screen, comprising at least in stacked arrangement:

the ink display device comprises a first conductive substrate, an ink display layer and a second conductive substrate;

the ink display layer is positioned between the first conductive substrate and the second conductive substrate, and the second conductive substrate is positioned above the first conductive substrate;

the ink display layer is provided with a plurality of mutually independent ink accommodating cavities, a plurality of ink particles of the same color are arranged in the ink accommodating cavities, and the ink particles are used for displaying a first color;

further comprising: a functional layer; the functional layer is used for displaying a second color; and the functional layer is positioned on one side of the ink display layer, which is far away from the second conductive substrate.

2. The electronic ink screen of claim 1, wherein the first conductive substrate comprises: a driving layer and an electrode layer;

the electrode layer includes: at least one electrode group; each ink accommodating cavity corresponds to one electrode group;

the electrode group includes: a first electrode and a second electrode; the first electrode and the second electrode are oppositely arranged along the thickness direction perpendicular to the electronic ink screen;

the driving layer provides voltage for the electrode layer, so that an electric field in a vertical direction is formed between the electrode layer and the second conductive substrate, and an electric field in a horizontal direction is formed between the first electrode and the second electrode;

the vertical electric field is used for controlling the ink particles to move in the ink accommodating cavity in the vertical direction, and the horizontal electric field is used for controlling the ink particles to move in the ink accommodating cavity in the horizontal direction.

3. The electronic ink screen of claim 2, wherein the drive layer comprises: a substrate layer and at least one drive switch located on the substrate layer;

the at least one drive switch provides a voltage to the electrode layer.

4. The electronic ink screen of claim 3, wherein each of the ink receiving chambers corresponds to a drive switch;

the driving switch provides voltage for the first electrode, or the driving switch provides voltage for the second electrode.

5. The electronic ink screen of claim 3, wherein each of the ink containing chambers corresponds to two driving switches;

one of the two drive switches provides a voltage to the first electrode and the other of the two drive switches provides a voltage to the second electrode.

6. The electronic ink screen of any of claims 2-5, wherein the functional layer is a black matrix layer; the ink particles are white ink particles.

7. The electronic ink screen of claim 6,

in a first driving state, an electric field in the horizontal direction is formed between the first electrode and the second electrode, the white ink particles move to be close to the inner side wall of the ink accommodating cavity, and the electronic ink screen displays black;

in a second driving state, an electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the white ink particles move to the inner top wall or the inner bottom wall close to the ink accommodating cavity, and the electronic ink screen displays white;

in a third driving state, an electric field in the horizontal direction is formed between the first electrode and the second electrode, an electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the white ink particles are dispersedly arranged in the ink accommodating cavity, and the electronic ink screen displays an grey state.

8. The electronic ink screen of claim 6 or 7, wherein the black matrix layer is located between the ink display layer and the first conductive substrate.

9. The electronic ink screen of claim 6 or 7, wherein the black matrix layer is located between the electrode layer and the driving layer.

10. The electronic ink screen of any of claims 2-5, wherein the functional layer is a reflective metal layer; the ink particles are black ink particles.

11. The electronic ink screen of claim 10,

in a first driving state, an electric field in the horizontal direction is formed between the first electrode and the second electrode, the black ink particles move to be close to the inner side wall of the ink accommodating cavity, and the electronic ink screen displays white;

in a second driving state, an electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the black ink particles move to the inner top wall or the inner bottom wall close to the ink accommodating cavity, and the electronic ink screen displays black;

in a third driving state, an electric field in the horizontal direction is formed between the first electrode and the second electrode, an electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the black ink particles are dispersedly arranged in the ink accommodating cavity, and the electronic ink screen displays a gray state.

12. The electronic ink screen of claim 10 or 11, wherein the reflective metal layer is located between the electrode layer and the driving layer.

13. The electronic ink screen of any of claims 2-5, wherein the functional layer is a display screen.

14. The electronic ink screen of claim 13, wherein the ink particles are white ink particles; the display screen is in a black state.

15. The electronic ink screen of claim 14,

in a first driving state, an electric field in the horizontal direction is formed between the first electrode and the second electrode, the white ink particles move to be close to the inner side wall of the ink accommodating cavity, and the electronic ink screen displays black;

in a second driving state, an electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the white ink particles move to the inner top wall or the inner bottom wall close to the ink accommodating cavity, and the electronic ink screen displays white;

in a third driving state, an electric field in the horizontal direction is formed between the first electrode and the second electrode, an electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the white ink particles are dispersedly arranged in the ink accommodating cavity, and the electronic ink screen displays an grey state.

16. The electronic ink screen of claim 13, wherein the ink particles are black ink particles; the display screen is in a display state.

17. The electronic ink screen of claim 16,

in a first driving state, an electric field in the horizontal direction is formed between the first electrode and the second electrode, the black ink particles move to be close to the inner side wall of the ink accommodating cavity, and the electronic ink screen displays white;

in a second driving state, an electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the black ink particles move to the inner top wall or the inner bottom wall close to the ink accommodating cavity, and the electronic ink screen displays black;

in a third driving state, an electric field in the horizontal direction is formed between the first electrode and the second electrode, an electric field in the vertical direction is formed between the electrode layer and the second conductive substrate, the black ink particles are arranged in the ink accommodating cavity in a dispersing manner, and the electronic ink screen displays a gray state.

18. The electronic ink screen of any one of claims 13-17, wherein the display screen is located on a side of the first conductive substrate facing away from the ink display layer.

19. The electronic ink screen of any one of claims 1-18, wherein the ink display layer comprises: a plurality of microcapsule structures, an inner space of each of the microcapsule structures being formed as the ink containing chamber.

20. The electronic ink screen of any one of claims 1-18, wherein the ink display layer comprises: and the inner space of each micro-cup structure forms the ink accommodating cavity.

21. The electronic ink screen of any of claims 1-20, wherein an electrophoretic base fluid is further disposed in the ink receiving chamber, and the ink particles move in the electrophoretic base fluid.

22. A display device, characterized by comprising at least: the electronic ink screen of any one of claims 1-21 above.

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